When I was doing similar I used Ashdown amps, both ABMs and RMs, as both have an EQ bypass switch, hence my reasons for using them. The RM amps are Class D, small, light & powerful. They did do a 300 watt version, but used you can get the 500s for around £300ish. Reliability-wise they`re good, and being based in the UK any issues they`ll sort quickly.